Cherry Bomb W/ Air Box On?

I really want the Yoshi Cherry Bomb, but everywhere I read, I see the you have to take your airbox off. I have to admit Im al little scared to just leave it off, we ride in what can be pretty dusty/muddy/wet conditions. Isnt there a chance that ill let in wayyyy to much of this stuff into the intake?

So do you HAVE to take the airbox off? And if so, am I just buggin out and the truth is ill be fine w/o it on?


Thanks! Parker